summaryrefslogtreecommitdiffstats
path: root/src/com/android/launcher3/AppsCustomizePagedView.java
blob: cb82e14e1cb392066b9bf079effc58de34e40a04 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.launcher3;

import android.animation.AnimatorSet;
import android.animation.ValueAnimator;
import android.appwidget.AppWidgetHostView;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProviderInfo;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Process;
import android.provider.Settings;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateInterpolator;
import android.widget.GridLayout;
import android.widget.ImageView;
import android.widget.Toast;
import com.android.launcher3.DropTarget.DragObject;
import com.android.launcher3.compat.AppWidgetManagerCompat;
import com.android.launcher3.settings.SettingsProvider;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;

/**
 * A simple callback interface which also provides the results of the task.
 */
interface AsyncTaskCallback {
    void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data);
}

/**
 * The data needed to perform either of the custom AsyncTasks.
 */
class AsyncTaskPageData {
    enum Type {
        LoadWidgetPreviewData
    }

    AsyncTaskPageData(int p, ArrayList<Object> l, int cw, int ch, AsyncTaskCallback bgR,
            AsyncTaskCallback postR, WidgetPreviewLoader w) {
        page = p;
        items = l;
        generatedImages = new ArrayList<Bitmap>();
        maxImageWidth = cw;
        maxImageHeight = ch;
        doInBackgroundCallback = bgR;
        postExecuteCallback = postR;
        widgetPreviewLoader = w;
    }
    void cleanup(boolean cancelled) {
        // Clean up any references to source/generated bitmaps
        if (generatedImages != null) {
            if (cancelled) {
                for (int i = 0; i < generatedImages.size(); i++) {
                    widgetPreviewLoader.recycleBitmap(items.get(i), generatedImages.get(i));
                }
            }
            generatedImages.clear();
        }
    }
    int page;
    ArrayList<Object> items;
    ArrayList<Bitmap> sourceImages;
    ArrayList<Bitmap> generatedImages;
    int maxImageWidth;
    int maxImageHeight;
    AsyncTaskCallback doInBackgroundCallback;
    AsyncTaskCallback postExecuteCallback;
    WidgetPreviewLoader widgetPreviewLoader;
}

/**
 * A generic template for an async task used in AppsCustomize.
 */
class AppsCustomizeAsyncTask extends AsyncTask<AsyncTaskPageData, Void, AsyncTaskPageData> {
    AppsCustomizeAsyncTask(int p, AsyncTaskPageData.Type ty) {
        page = p;
        threadPriority = Process.THREAD_PRIORITY_DEFAULT;
        dataType = ty;
    }
    @Override
    protected AsyncTaskPageData doInBackground(AsyncTaskPageData... params) {
        if (params.length != 1) return null;
        // Load each of the widget previews in the background
        params[0].doInBackgroundCallback.run(this, params[0]);
        return params[0];
    }
    @Override
    protected void onPostExecute(AsyncTaskPageData result) {
        // All the widget previews are loaded, so we can just callback to inflate the page
        result.postExecuteCallback.run(this, result);
    }

    void setThreadPriority(int p) {
        threadPriority = p;
    }
    void syncThreadPriority() {
        Process.setThreadPriority(threadPriority);
    }

    // The page that this async task is associated with
    AsyncTaskPageData.Type dataType;
    int page;
    int threadPriority;
}

/**
 * The Apps/Customize page that displays all the applications, widgets, and shortcuts.
 */
public class AppsCustomizePagedView extends PagedViewWithDraggableItems implements
        View.OnClickListener, View.OnKeyListener, DragSource,
        PagedViewWidget.ShortPressListener, LauncherTransitionable {
    static final String TAG = "AppsCustomizePagedView";

    private static Rect sTmpRect = new Rect();

    /**
     * The different content types that this paged view can show.
     */
    public enum ContentType {
        Applications,
        Widgets
    }
    private ContentType mContentType = ContentType.Applications;

    /**
     * The different sort modes than can be used to order items.
     */
    public enum SortMode {
        Title(0),
        LaunchCount(1),
        InstallTime(2);

        private final int mValue;
        private SortMode(int value) {
            mValue = value;
        }

        public int getValue() {
            return mValue;
        }

        public static SortMode getModeForValue(int value) {
            switch (value) {
            case 1:
                return LaunchCount;
            case 2:
                return InstallTime;
            default :
                return Title;
            }
        }
    }
    private SortMode mSortMode = SortMode.Title;

    private int mFilterApps = FILTER_APPS_SYSTEM_FLAG | FILTER_APPS_DOWNLOADED_FLAG;

    private static final int FILTER_APPS_SYSTEM_FLAG = 1;
    private static final int FILTER_APPS_DOWNLOADED_FLAG = 2;

    // Refs
    private Launcher mLauncher;
    private DragController mDragController;
    private final LayoutInflater mLayoutInflater;
    private final PackageManager mPackageManager;

    // Save and Restore
    private int mSaveInstanceStateItemIndex = -1;

    // Content
    private ArrayList<AppInfo> mApps;
    private ArrayList<Object> mWidgets;

    private ArrayList<AppInfo> mFilteredApps;
    private ArrayList<Object> mFilteredWidgets;

    private ArrayList<ComponentName> mProtectedApps;
    private ArrayList<String> mProtectedPackages;

    // Cling
    private boolean mHasShownAllAppsCling;
    private int mClingFocusedX;
    private int mClingFocusedY;

    // Caching
    private IconCache mIconCache;

    // Dimens
    private int mContentWidth, mContentHeight;
    private int mWidgetCountX, mWidgetCountY;
    private PagedViewCellLayout mWidgetSpacingLayout;
    private int mNumAppsPages;
    private int mNumWidgetPages;
    private Rect mAllAppsPadding = new Rect();

    // Animation states
    enum State { NORMAL, OVERVIEW};
    private State mState = State.NORMAL;
    private boolean mIsSwitchingState = false;

    // Animation values
    private float mNewScale;
    private float[] mOldBackgroundAlphas;
    private float[] mOldAlphas;
    private float[] mNewBackgroundAlphas;
    private float[] mNewAlphas;

    // Relating to the scroll and overscroll effects
    private static float TRANSITION_MAX_ROTATION = 22;
    private static final float ALPHA_CUTOFF_THRESHOLD = 0.01f;
    private boolean mOverscrollTransformsSet;
    private float mLastOverscrollPivotX;

    public static boolean DISABLE_ALL_APPS = false;

    // Previews & outlines
    ArrayList<AppsCustomizeAsyncTask> mRunningTasks;
    private static final int sPageSleepDelay = 200;

    private Runnable mInflateWidgetRunnable = null;
    private Runnable mBindWidgetRunnable = null;
    static final int WIDGET_NO_CLEANUP_REQUIRED = -1;
    static final int WIDGET_PRELOAD_PENDING = 0;
    static final int WIDGET_BOUND = 1;
    static final int WIDGET_INFLATED = 2;
    int mWidgetCleanupState = WIDGET_NO_CLEANUP_REQUIRED;
    int mWidgetLoadingId = -1;
    PendingAddWidgetInfo mCreateWidgetInfo = null;
    private boolean mDraggingWidget = false;
    boolean mPageBackgroundsVisible = true;

    private Toast mWidgetInstructionToast;

    // Deferral of loading widget previews during launcher transitions
    private boolean mInTransition;
    private ArrayList<AsyncTaskPageData> mDeferredSyncWidgetPageItems =
        new ArrayList<AsyncTaskPageData>();
    private ArrayList<Runnable> mDeferredPrepareLoadWidgetPreviewsTasks =
        new ArrayList<Runnable>();

    WidgetPreviewLoader mWidgetPreviewLoader;

    private boolean mInBulkBind;
    private boolean mNeedToUpdatePageCountsAndInvalidateData;
    private int mMode = 0;

    // For fix location function
    private static final String PRE_PACKAGE_NAME = "com.android.launcher.res";
    private static final String PRE_CLASS_IDENTIFIER = "pre_install_class";
    private static final String CT_CLASS_IDENTIFIER = "ct_install_class";
    private static final String CT_FIRSTPAGE_IDENTIFIER = "ct_firstpage_app";

    // Set first two pages for CT apps
    private static final int CT_CUSTOMIZED_PAGE_COUNT = 2;

    private boolean mPreInstallConfig = false;
    private ArrayList<String> mPreClassArray = new ArrayList<String> ();
    private ArrayList<String> mCTClassArray = new ArrayList<String> ();
    private ArrayList<String> mCTFirstPageArray = new ArrayList<String> ();

    private ArrayList<AppInfo> mPreAppList = new ArrayList<AppInfo>();
    private ArrayList<AppInfo> ctApps = new ArrayList<AppInfo>();
    private ArrayList<AppInfo> ctFirstPageApps = new ArrayList<AppInfo>();

    private final Comparator<AppInfo> PREAPP_CT_COMPARATOR
            = new Comparator<AppInfo>() {

        public final int compare(AppInfo a, AppInfo b) {
            int indexA = getIndexOfComponent(mPreClassArray, a.componentName);
            int indexB = getIndexOfComponent(mPreClassArray, b.componentName);
            return indexA < indexB ? -1 : 1;
        }
    };

    private final Comparator<AppInfo> APP_CT_COMPARATOR
            = new Comparator<AppInfo>() {

        public final int compare(AppInfo a, AppInfo b) {
            int indexA = getIndexOfComponent(mCTClassArray, a.componentName);
            int indexB = getIndexOfComponent(mCTClassArray, b.componentName);
            return indexA < indexB ? -1 : 1;
        }
    };

    private final Comparator<AppInfo> APP_CT_FIRSTPAGE_COMPARATOR
            = new Comparator<AppInfo>() {

        public final int compare(AppInfo a, AppInfo b) {
            int indexA = getIndexOfComponent(mCTFirstPageArray, a.componentName);
            int indexB = getIndexOfComponent(mCTFirstPageArray, b.componentName);
            return indexA < indexB ? -1 : 1;
        }
    };

    public AppsCustomizePagedView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mLayoutInflater = LayoutInflater.from(context);
        mPackageManager = context.getPackageManager();
        mApps = new ArrayList<AppInfo>();
        mFilteredApps = new ArrayList<AppInfo>();
        mWidgets = new ArrayList<Object>();
        mFilteredWidgets = new ArrayList<Object>();
        mIconCache = (LauncherAppState.getInstance()).getIconCache();
        mRunningTasks = new ArrayList<AppsCustomizeAsyncTask>();

        // Save the default widget preview background
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AppsCustomizePagedView, 0, 0);
        mWidgetCountX = a.getInt(R.styleable.AppsCustomizePagedView_widgetCountX, 2);
        mWidgetCountY = a.getInt(R.styleable.AppsCustomizePagedView_widgetCountY, 2);
        a.recycle();
        mWidgetSpacingLayout = new PagedViewCellLayout(getContext());

        // The padding on the non-matched dimension for the default widget preview icons
        // (top + bottom)
        mFadeInAdjacentScreens = false;

        TransitionEffect.setFromString(this, SettingsProvider.getString(context,
                SettingsProvider.SETTINGS_UI_DRAWER_SCROLLING_TRANSITION_EFFECT,
                R.string.preferences_interface_drawer_scrolling_transition_effect));

        // Unless otherwise specified this view is important for accessibility.
        if (getImportantForAccessibility() == View.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
            setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
        }
        setSinglePageInViewport();

        updateProtectedAppsList(context);

        configClassArray(context, mPreClassArray, PRE_CLASS_IDENTIFIER, true);

        if (LauncherApplication.SHOW_CTAPP_FEATURE) {
            configClassArray(context, mCTClassArray, CT_CLASS_IDENTIFIER, false);
            configClassArray(context, mCTFirstPageArray, CT_FIRSTPAGE_IDENTIFIER, false);
        }
    }

    @Override
    protected void init() {
        super.init();
        mCenterPagesVertically = false;

        Context context = getContext();
        Resources r = context.getResources();
        mCameraDistance = (int) CAMERA_DISTANCE;//r.getInteger(R.integer.config_cameraDistance);
        setDragSlopeThreshold(r.getInteger(R.integer.config_appsCustomizeDragSlopeThreshold)/100f);
    }

    public void onFinishInflate() {
        super.onFinishInflate();

        LauncherAppState app = LauncherAppState.getInstance();
        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
        setPadding(grid.edgeMarginPx, 2 * grid.edgeMarginPx,
                grid.edgeMarginPx, 2 * grid.edgeMarginPx);
    }

    void setAllAppsPadding(Rect r) {
        mAllAppsPadding.set(r);
    }

    void setWidgetsPageIndicatorPadding(int pageIndicatorHeight) {
        setPadding(getPaddingLeft(), getPaddingTop(), getPaddingRight(), pageIndicatorHeight);
    }

    WidgetPreviewLoader getWidgetPreviewLoader() {
        if (mWidgetPreviewLoader == null) {
            mWidgetPreviewLoader = new WidgetPreviewLoader(mLauncher);
        }
        return mWidgetPreviewLoader;
    }

    /** Returns the item index of the center item on this page so that we can restore to this
     *  item index when we rotate. */
    private int getMiddleComponentIndexOnCurrentPage() {
        int i = -1;
        if (getPageCount() > 0) {
            int currentPage = getCurrentPage();
            if (mContentType == ContentType.Applications) {
                AppsCustomizeCellLayout layout = (AppsCustomizeCellLayout) getPageAt(currentPage);
                ShortcutAndWidgetContainer childrenLayout = layout.getShortcutsAndWidgets();
                int numItemsPerPage = mCellCountX * mCellCountY;
                int childCount = childrenLayout.getChildCount();
                if (childCount > 0) {
                    i = (currentPage * numItemsPerPage) + (childCount / 2);
                }
            } else if (mContentType == ContentType.Widgets) {
                int numApps = mFilteredApps.size();
                PagedViewGridLayout layout = (PagedViewGridLayout) getPageAt(currentPage);
                int numItemsPerPage = mWidgetCountX * mWidgetCountY;
                int childCount = layout.getChildCount();
                if (childCount > 0) {
                    i = numApps +
                        (currentPage * numItemsPerPage) + (childCount / 2);
                }
            } else {
                throw new RuntimeException("Invalid ContentType");
            }
        }
        return i;
    }

    /** Get the index of the item to restore to if we need to restore the current page. */
    int getSaveInstanceStateIndex() {
        if (mSaveInstanceStateItemIndex == -1) {
            mSaveInstanceStateItemIndex = getMiddleComponentIndexOnCurrentPage();
        }
        return mSaveInstanceStateItemIndex;
    }

    /** Returns the page in the current orientation which is expected to contain the specified
     *  item index. */
    int getPageForComponent(int index) {
        if (index < 0) return 0;

        if (index < mFilteredApps.size()) {
            int numItemsPerPage = mCellCountX * mCellCountY;
            return (index / numItemsPerPage);
        } else {
            int numItemsPerPage = mWidgetCountX * mWidgetCountY;
            return (index - mFilteredApps.size()) / numItemsPerPage;
        }
    }

    /** Restores the page for an item at the specified index */
    void restorePageForIndex(int index) {
        if (index < 0) return;
        mSaveInstanceStateItemIndex = index;
    }

    private void updatePageCounts() {
        mNumWidgetPages = (int) Math.ceil((float) mFilteredWidgets.size() /
                (float) (mWidgetCountX * mWidgetCountY));
        mNumAppsPages = (int) Math.ceil((float) mFilteredApps.size() / (mCellCountX * mCellCountY));
        if(LauncherApplication.SHOW_CTAPP_FEATURE){
            mNumAppsPages = mNumAppsPages + 2; //for ct
        }
    }

    protected void onDataReady(int width, int height) {
        // Now that the data is ready, we can calculate the content width, the number of cells to
        // use for each page
        updateGridSize();

        // Force a measure to update recalculate the gaps
        mContentWidth = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
        mContentHeight = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();
        int widthSpec = MeasureSpec.makeMeasureSpec(mContentWidth, MeasureSpec.AT_MOST);
        int heightSpec = MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.AT_MOST);
        mWidgetSpacingLayout.measure(widthSpec, heightSpec);

        final boolean hostIsTransitioning = getTabHost().isInTransition();
        int page = getPageForComponent(mSaveInstanceStateItemIndex);
        invalidatePageData(Math.max(0, page), hostIsTransitioning);
    }

    public void updateGridSize() {
        if (!isDataReady()) {
            return;
        }
        LauncherAppState app = LauncherAppState.getInstance();
        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
        mCellCountX = (int) grid.allAppsNumCols;
        mCellCountY = (int) grid.allAppsNumRows;
        updatePageCounts();
    }

    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);

        if (!isDataReady()) {
            if ((LauncherAppState.isDisableAllApps() || !mFilteredApps.isEmpty())
                    && !mFilteredWidgets.isEmpty()) {
                post(new Runnable() {
                    // This code triggers requestLayout so must be posted outside of the
                    // layout pass.
                    public void run() {
                        boolean attached = true;
                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                            attached = isAttachedToWindow();
                        }
                        if (attached) {
                            setDataIsReady();
                            onDataReady(getMeasuredWidth(), getMeasuredHeight());
                        }
                    }
                });
            }
        }
    }

    public void onPackagesUpdated(ArrayList<Object> widgetsAndShortcuts) {
        LauncherAppState app = LauncherAppState.getInstance();
        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();

        // Get the list of widgets and shortcuts
        mWidgets.clear();
        for (Object o : widgetsAndShortcuts) {
            if (o instanceof AppWidgetProviderInfo) {
                AppWidgetProviderInfo widget = (AppWidgetProviderInfo) o;
                if (!app.shouldShowAppOrWidgetProvider(widget.provider)) {
                    continue;
                }
                if (widget.minWidth > 0 && widget.minHeight > 0) {
                    // Ensure that all widgets we show can be added on a workspace of this size
                    int[] spanXY = Launcher.getSpanForWidget(mLauncher, widget);
                    int[] minSpanXY = Launcher.getMinSpanForWidget(mLauncher, widget);
                    int minSpanX = Math.min(spanXY[0], minSpanXY[0]);
                    int minSpanY = Math.min(spanXY[1], minSpanXY[1]);
                    if (minSpanX <= (int) grid.numColumns &&
                        minSpanY <= (int) grid.numRows) {
                        mWidgets.add(widget);
                    } else {
                        Log.e(TAG, "Widget " + widget.provider + " can not fit on this device (" +
                              widget.minWidth + ", " + widget.minHeight + ")");
                    }
                } else {
                    Log.e(TAG, "Widget " + widget.provider + " has invalid dimensions (" +
                          widget.minWidth + ", " + widget.minHeight + ")");
                }
            } else {
                // just add shortcuts
                mWidgets.add(o);
            }
        }
        filterWidgets();
    }

    public void setBulkBind(boolean bulkBind) {
        if (bulkBind) {
            mInBulkBind = true;
        } else {
            mInBulkBind = false;
            if (mNeedToUpdatePageCountsAndInvalidateData) {
                updatePageCountsAndInvalidateData();
            }
        }
    }

    private void updatePageCountsAndInvalidateData() {
        if (mInBulkBind) {
            mNeedToUpdatePageCountsAndInvalidateData = true;
        } else {
            updatePageCounts();
            invalidateOnDataChange();
            mNeedToUpdatePageCountsAndInvalidateData = false;
        }
    }

    @Override
    public void onClick(View v) {
        // When we have exited all apps or are in transition, disregard clicks
        if (!mLauncher.isAllAppsVisible()
                || mLauncher.getWorkspace().isSwitchingState()
                || !(v instanceof PagedViewWidget)) return;

        // Let the user know that they have to long press to add a widget
        if (mWidgetInstructionToast != null) {
            mWidgetInstructionToast.cancel();
        }
        mWidgetInstructionToast = Toast.makeText(getContext(),R.string.long_press_widget_to_add,
            Toast.LENGTH_SHORT);
        mWidgetInstructionToast.show();

        // Create a little animation to show that the widget can move
        float offsetY = getResources().getDimensionPixelSize(R.dimen.dragViewOffsetY);
        final ImageView p = (ImageView) v.findViewById(R.id.widget_preview);
        AnimatorSet bounce = LauncherAnimUtils.createAnimatorSet();
        ValueAnimator tyuAnim = LauncherAnimUtils.ofFloat(p, "translationY", offsetY);
        tyuAnim.setDuration(125);
        ValueAnimator tydAnim = LauncherAnimUtils.ofFloat(p, "translationY", 0f);
        tydAnim.setDuration(100);
        bounce.play(tyuAnim).before(tydAnim);
        bounce.setInterpolator(new AccelerateInterpolator());
        bounce.start();
    }

    public boolean onKey(View v, int keyCode, KeyEvent event) {
        return FocusHelper.handleAppsCustomizeKeyEvent(v,  keyCode, event);
    }

    /*
     * PagedViewWithDraggableItems implementation
     */
    @Override
    protected void determineDraggingStart(android.view.MotionEvent ev) {
        // Disable dragging by pulling an app down for now.
    }

    private void beginDraggingApplication(View v) {
        mLauncher.getWorkspace().beginDragShared(v, this);
    }

    static Bundle getDefaultOptionsForWidget(Launcher launcher, PendingAddWidgetInfo info) {
        Bundle options = null;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            AppWidgetResizeFrame.getWidgetSizeRanges(launcher, info.spanX, info.spanY, sTmpRect);
            Rect padding = AppWidgetHostView.getDefaultPaddingForWidget(launcher,
                    info.componentName, null);

            float density = launcher.getResources().getDisplayMetrics().density;
            int xPaddingDips = (int) ((padding.left + padding.right) / density);
            int yPaddingDips = (int) ((padding.top + padding.bottom) / density);

            options = new Bundle();
            options.putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH,
                    sTmpRect.left - xPaddingDips);
            options.putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT,
                    sTmpRect.top - yPaddingDips);
            options.putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH,
                    sTmpRect.right - xPaddingDips);
            options.putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT,
                    sTmpRect.bottom - yPaddingDips);
        }
        return options;
    }

    private void preloadWidget(final PendingAddWidgetInfo info) {
        final AppWidgetProviderInfo pInfo = info.info;
        final Bundle options = getDefaultOptionsForWidget(mLauncher, info);

        if (pInfo.configure != null) {
            info.bindOptions = options;
            return;
        }

        mWidgetCleanupState = WIDGET_PRELOAD_PENDING;
        mBindWidgetRunnable = new Runnable() {
            @Override
            public void run() {
                mWidgetLoadingId = mLauncher.getAppWidgetHost().allocateAppWidgetId();
                if(AppWidgetManagerCompat.getInstance(mLauncher).bindAppWidgetIdIfAllowed(
                        mWidgetLoadingId, pInfo, options)) {
                    mWidgetCleanupState = WIDGET_BOUND;
                }
            }
        };
        post(mBindWidgetRunnable);

        mInflateWidgetRunnable = new Runnable() {
            @Override
            public void run() {
                if (mWidgetCleanupState != WIDGET_BOUND) {
                    return;
                }
                AppWidgetHostView hostView = mLauncher.
                        getAppWidgetHost().createView(getContext(), mWidgetLoadingId, pInfo);
                info.boundWidget = hostView;
                mWidgetCleanupState = WIDGET_INFLATED;
                hostView.setVisibility(INVISIBLE);
                int[] unScaledSize = mLauncher.getWorkspace().estimateItemSize(info.spanX,
                        info.spanY, info, false);

                // We want the first widget layout to be the correct size. This will be important
                // for width size reporting to the AppWidgetManager.
                DragLayer.LayoutParams lp = new DragLayer.LayoutParams(unScaledSize[0],
                        unScaledSize[1]);
                lp.x = lp.y = 0;
                lp.customPosition = true;
                hostView.setLayoutParams(lp);
                mLauncher.getDragLayer().addView(hostView);
            }
        };
        post(mInflateWidgetRunnable);
    }

    @Override
    public void onShortPress(View v) {
        // We are anticipating a long press, and we use this time to load bind and instantiate
        // the widget. This will need to be cleaned up if it turns out no long press occurs.
        if (mCreateWidgetInfo != null) {
            // Just in case the cleanup process wasn't properly executed. This shouldn't happen.
            cleanupWidgetPreloading(false);
        }
        mCreateWidgetInfo = new PendingAddWidgetInfo((PendingAddWidgetInfo) v.getTag());
        preloadWidget(mCreateWidgetInfo);
    }

    private void cleanupWidgetPreloading(boolean widgetWasAdded) {
        if (!widgetWasAdded) {
            // If the widget was not added, we may need to do further cleanup.
            PendingAddWidgetInfo info = mCreateWidgetInfo;
            mCreateWidgetInfo = null;

            if (mWidgetCleanupState == WIDGET_PRELOAD_PENDING) {
                // We never did any preloading, so just remove pending callbacks to do so
                removeCallbacks(mBindWidgetRunnable);
                removeCallbacks(mInflateWidgetRunnable);
            } else if (mWidgetCleanupState == WIDGET_BOUND) {
                 // Delete the widget id which was allocated
                if (mWidgetLoadingId != -1) {
                    mLauncher.getAppWidgetHost().deleteAppWidgetId(mWidgetLoadingId);
                }

                // We never got around to inflating the widget, so remove the callback to do so.
                removeCallbacks(mInflateWidgetRunnable);
            } else if (mWidgetCleanupState == WIDGET_INFLATED) {
                // Delete the widget id which was allocated
                if (mWidgetLoadingId != -1) {
                    mLauncher.getAppWidgetHost().deleteAppWidgetId(mWidgetLoadingId);
                }

                // The widget was inflated and added to the DragLayer -- remove it.
                AppWidgetHostView widget = info.boundWidget;
                mLauncher.getDragLayer().removeView(widget);
            }
        }
        mWidgetCleanupState = WIDGET_NO_CLEANUP_REQUIRED;
        mWidgetLoadingId = -1;
        mCreateWidgetInfo = null;
        PagedViewWidget.resetShortPressTarget();
    }

    @Override
    public void cleanUpShortPress(View v) {
        if (!mDraggingWidget) {
            cleanupWidgetPreloading(false);
        }
    }

    private boolean beginDraggingWidget(View v) {
        mDraggingWidget = true;
        // Get the widget preview as the drag representation
        ImageView image = (ImageView) v.findViewById(R.id.widget_preview);
        PendingAddItemInfo createItemInfo = (PendingAddItemInfo) v.getTag();

        // If the ImageView doesn't have a drawable yet, the widget preview hasn't been loaded and
        // we abort the drag.
        if (image.getDrawable() == null) {
            mDraggingWidget = false;
            return false;
        }

        // Compose the drag image
        Bitmap preview;
        Bitmap outline;
        float scale = 1f;
        Point previewPadding = null;

        if (createItemInfo instanceof PendingAddWidgetInfo) {
            // This can happen in some weird cases involving multi-touch. We can't start dragging
            // the widget if this is null, so we break out.
            if (mCreateWidgetInfo == null) {
                return false;
            }

            PendingAddWidgetInfo createWidgetInfo = mCreateWidgetInfo;
            createItemInfo = createWidgetInfo;
            int spanX = createItemInfo.spanX;
            int spanY = createItemInfo.spanY;
            int[] size = mLauncher.getWorkspace().estimateItemSize(spanX, spanY,
                    createWidgetInfo, true);

            FastBitmapDrawable previewDrawable = (FastBitmapDrawable) image.getDrawable();
            float minScale = 1.25f;
            int maxWidth, maxHeight;
            maxWidth = Math.min((int) (previewDrawable.getIntrinsicWidth() * minScale), size[0]);
            maxHeight = Math.min((int) (previewDrawable.getIntrinsicHeight() * minScale), size[1]);

            int[] previewSizeBeforeScale = new int[1];

            preview = getWidgetPreviewLoader().generateWidgetPreview(createWidgetInfo.info,
                    spanX, spanY, maxWidth, maxHeight, null, previewSizeBeforeScale);

            // Compare the size of the drag preview to the preview in the AppsCustomize tray
            int previewWidthInAppsCustomize = Math.min(previewSizeBeforeScale[0],
                    getWidgetPreviewLoader().maxWidthForWidgetPreview(spanX));
            scale = previewWidthInAppsCustomize / (float) preview.getWidth();

            // The bitmap in the AppsCustomize tray is always the the same size, so there
            // might be extra pixels around the preview itself - this accounts for that
            if (previewWidthInAppsCustomize < previewDrawable.getIntrinsicWidth()) {
                int padding =
                        (previewDrawable.getIntrinsicWidth() - previewWidthInAppsCustomize) / 2;
                previewPadding = new Point(padding, 0);
            }
        } else {
            PendingAddShortcutInfo createShortcutInfo = (PendingAddShortcutInfo) v.getTag();
            Drawable icon = mIconCache.getFullResIcon(createShortcutInfo.shortcutActivityInfo);
            preview = Utilities.createIconBitmap(icon, mLauncher);
            createItemInfo.spanX = createItemInfo.spanY = 1;
        }

        // Don't clip alpha values for the drag outline if we're using the default widget preview
        boolean clipAlpha = !(createItemInfo instanceof PendingAddWidgetInfo &&
                (((PendingAddWidgetInfo) createItemInfo).previewImage == 0));

        // Save the preview for the outline generation, then dim the preview
        outline = Bitmap.createScaledBitmap(preview, preview.getWidth(), preview.getHeight(),
                false);

        // Start the drag
        mLauncher.lockScreenOrientation();
        mLauncher.getWorkspace().onDragStartedWithItem(createItemInfo, outline, clipAlpha);
        mDragController.startDrag(image, preview, this, createItemInfo,
                DragController.DRAG_ACTION_COPY, previewPadding, scale);
        outline.recycle();
        preview.recycle();
        return true;
    }

    @Override
    protected boolean beginDragging(final View v) {
        if (!super.beginDragging(v)) return false;

        if (v instanceof BubbleTextView) {
            beginDraggingApplication(v);
        } else if (v instanceof PagedViewWidget) {
            if (!beginDraggingWidget(v)) {
                return false;
            }
        }

        // We delay entering spring-loaded mode slightly to make sure the UI
        // thready is free of any work.
        postDelayed(new Runnable() {
            @Override
            public void run() {
                // We don't enter spring-loaded mode if the drag has been cancelled
                if (mLauncher.getDragController().isDragging()) {
                    // Go into spring loaded mode (must happen before we startDrag())
                    mLauncher.enterSpringLoadedDragMode();
                }
            }
        }, 150);

        return true;
    }

    /**
     * Clean up after dragging.
     *
     * @param target where the item was dragged to (can be null if the item was flung)
     */
    private void endDragging(View target, boolean isFlingToDelete, boolean success) {
        if (isFlingToDelete || !success || (target != mLauncher.getWorkspace() &&
                !(target instanceof DeleteDropTarget) && !(target instanceof Folder))) {
            // Exit spring loaded mode if we have not successfully dropped or have not handled the
            // drop in Workspace
            mLauncher.exitSpringLoadedDragMode();
            mLauncher.unlockScreenOrientation(false);
        } else {
            mLauncher.unlockScreenOrientation(false);
        }
    }

    @Override
    public View getContent() {
        if (getChildCount() > 0) {
            return getChildAt(0);
        }
        return null;
    }

    @Override
    public void onLauncherTransitionPrepare(Launcher l, boolean animated, boolean toWorkspace) {
        mInTransition = true;
        if (toWorkspace) {
            cancelAllTasks();
        }
    }

    @Override
    public void onLauncherTransitionStart(Launcher l, boolean animated, boolean toWorkspace) {
    }

    @Override
    public void onLauncherTransitionStep(Launcher l, float t) {
    }

    @Override
    public void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace) {
        mInTransition = false;
        for (AsyncTaskPageData d : mDeferredSyncWidgetPageItems) {
            onSyncWidgetPageItems(d, false);
        }
        mDeferredSyncWidgetPageItems.clear();
        for (Runnable r : mDeferredPrepareLoadWidgetPreviewsTasks) {
            r.run();
        }
        mDeferredPrepareLoadWidgetPreviewsTasks.clear();
        mForceDrawAllChildrenNextFrame = !toWorkspace;
    }

    @Override
    public void onDropCompleted(View target, DragObject d, boolean isFlingToDelete,
            boolean success) {
        // Return early and wait for onFlingToDeleteCompleted if this was the result of a fling
        if (isFlingToDelete) return;

        endDragging(target, false, success);

        // Display an error message if the drag failed due to there not being enough space on the
        // target layout we were dropping on.
        if (!success) {
            boolean showOutOfSpaceMessage = false;
            if (target instanceof Workspace) {
                int currentScreen = mLauncher.getCurrentWorkspaceScreen();
                Workspace workspace = (Workspace) target;
                CellLayout layout = (CellLayout) workspace.getChildAt(currentScreen);
                ItemInfo itemInfo = (ItemInfo) d.dragInfo;
                if (layout != null) {
                    layout.calculateSpans(itemInfo);
                    showOutOfSpaceMessage =
                            !layout.findCellForSpan(null, itemInfo.spanX, itemInfo.spanY);
                }
            }
            if (showOutOfSpaceMessage) {
                mLauncher.showOutOfSpaceMessage(false);
            }

            d.deferDragViewCleanupPostAnimation = false;
        }
        cleanupWidgetPreloading(success);
        mDraggingWidget = false;
    }

    @Override
    public void onFlingToDeleteCompleted() {
        // We just dismiss the drag when we fling, so cleanup here
        endDragging(null, true, true);
        cleanupWidgetPreloading(false);
        mDraggingWidget = false;
    }

    @Override
    public boolean supportsFlingToDelete() {
        return true;
    }

    @Override
    public boolean supportsAppInfoDropTarget() {
        return true;
    }

    @Override
    public boolean supportsDeleteDropTarget() {
        return false;
    }

    @Override
    public float getIntrinsicIconScaleFactor() {
        LauncherAppState app = LauncherAppState.getInstance();
        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
        return (float) grid.allAppsIconSizePx / grid.iconSizePx;
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        cancelAllTasks();
    }

    public void clearAllWidgetPages() {
        cancelAllTasks();
        int count = getChildCount();
        for (int i = 0; i < count; i++) {
            View v = getPageAt(i);
            if (v instanceof PagedViewGridLayout) {
                ((PagedViewGridLayout) v).removeAllViewsOnPage();
                mDirtyPageContent.set(i, true);
            }
        }
    }

    private void cancelAllTasks() {
        // Clean up all the async tasks
        Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator();
        while (iter.hasNext()) {
            AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next();
            task.cancel(false);
            iter.remove();
            mDirtyPageContent.set(task.page, true);

            // We've already preallocated the views for the data to load into, so clear them as well
            View v = getPageAt(task.page);
            if (v instanceof PagedViewGridLayout) {
                ((PagedViewGridLayout) v).removeAllViewsOnPage();
            }
        }
        mDeferredSyncWidgetPageItems.clear();
        mDeferredPrepareLoadWidgetPreviewsTasks.clear();
    }

    public void setContentType(ContentType type) {
        // Widgets appear to be cleared every time you leave, always force invalidate for them
        if (mContentType != type || type == ContentType.Widgets) {
            int page = (mContentType != type) ? 0 : getCurrentPage();
            mContentType = type;
            invalidatePageData(page, true);
        }
    }

    public ContentType getContentType() {
        return mContentType;
    }

    protected void snapToPage(int whichPage, int delta, int duration) {
        super.snapToPage(whichPage, delta, duration);

        // Update the thread priorities given the direction lookahead
        Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator();
        while (iter.hasNext()) {
            AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next();
            int pageIndex = task.page;
            if ((mNextPage > mCurrentPage && pageIndex >= mCurrentPage) ||
                (mNextPage < mCurrentPage && pageIndex <= mCurrentPage)) {
                task.setThreadPriority(getThreadPriorityForPage(pageIndex));
            } else {
                task.setThreadPriority(Process.THREAD_PRIORITY_LOWEST);
            }
        }
    }

    /*
     * Apps PagedView implementation
     */
    private void setVisibilityOnChildren(ViewGroup layout, int visibility) {
        int childCount = layout.getChildCount();
        for (int i = 0; i < childCount; ++i) {
            layout.getChildAt(i).setVisibility(visibility);
        }
    }
    private void setupPage(AppsCustomizeCellLayout layout) {
        layout.setGridSize(mCellCountX, mCellCountY);

        // Note: We force a measure here to get around the fact that when we do layout calculations
        // immediately after syncing, we don't have a proper width.  That said, we already know the
        // expected page width, so we can actually optimize by hiding all the TextView-based
        // children that are expensive to measure, and let that happen naturally later.
        setVisibilityOnChildren(layout, View.GONE);
        int widthSpec = MeasureSpec.makeMeasureSpec(mContentWidth, MeasureSpec.AT_MOST);
        int heightSpec = MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.AT_MOST);
        layout.measure(widthSpec, heightSpec);

        Drawable bg = getContext().getResources().getDrawable(R.drawable.quantum_panel);
        if (bg != null) {
            bg.setAlpha(mPageBackgroundsVisible ? 255: 0);
            layout.setBackground(bg);
        }

        setVisibilityOnChildren(layout, View.VISIBLE);
    }

    public void setPageBackgroundsVisible(boolean visible) {
        mPageBackgroundsVisible = visible;
        int childCount = getChildCount();
        for (int i = 0; i < childCount; ++i) {
            Drawable bg = getChildAt(i).getBackground();
            if (bg != null) {
                bg.setAlpha(visible ? 255 : 0);
            }
        }
    }

    public void syncAppsPageItems(int page, boolean immediate) {
        // ensure that we have the right number of items on the pages
        final boolean isRtl = isLayoutRtl();
        int numCells = mCellCountX * mCellCountY;
        AppsCustomizeCellLayout layout = (AppsCustomizeCellLayout) getPageAt(page);

        //set page 1 & 2 to CT's app
        boolean isCTFlag = LauncherApplication.SHOW_CTAPP_FEATURE
                && (page < CT_CUSTOMIZED_PAGE_COUNT);

        int startIndex = isCTFlag ? 0 : ((LauncherApplication.SHOW_CTAPP_FEATURE
                && page >= CT_CUSTOMIZED_PAGE_COUNT) ? (page - CT_CUSTOMIZED_PAGE_COUNT) * numCells
                : page * numCells);

        int ctEndIndex = (page == 0) ? Math.min(startIndex + numCells, ctFirstPageApps.size())
                : Math.min(startIndex + numCells, ctApps.size());

        int defEndIndex = Math.min(startIndex + numCells, mFilteredApps.size());
        int endIndex = isCTFlag ? ctEndIndex : defEndIndex ;

        layout.removeAllViewsOnPage();
        ArrayList<Object> items = new ArrayList<Object>();
        ArrayList<Bitmap> images = new ArrayList<Bitmap>();
        boolean hideIconLabels = SettingsProvider.getBoolean(mLauncher,
                SettingsProvider.SETTINGS_UI_DRAWER_HIDE_ICON_LABELS,
                R.bool.preferences_interface_drawer_hide_icon_labels_default);
        for (int i = startIndex; i < endIndex; ++i) {
            AppInfo info = isCTFlag
                    ? ((page == 0) ? ctFirstPageApps.get(i) : ctApps.get(i))
                    : mFilteredApps.get(i);

            BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(
                    R.layout.apps_customize_application, layout, false);
            icon.applyFromApplicationInfo(info);
            icon.setTextVisibility(!hideIconLabels);
            icon.setOnClickListener(mLauncher);
            icon.setOnLongClickListener(this);
            icon.setOnTouchListener(this);
            icon.setOnKeyListener(this);
            icon.setOnFocusChangeListener(layout.mFocusHandlerView);

            int index = i - startIndex;
            int x = index % mCellCountX;
            int y = index / mCellCountX;
            if (isRtl) {
                x = mCellCountX - x - 1;
            }
            layout.addViewToCellLayout(icon, -1, i, new CellLayout.LayoutParams(x,y, 1,1), false);

            items.add(info);
            images.add(info.iconBitmap);
        }

        enableHwLayersOnVisiblePages();
    }

    /**
     * A helper to return the priority for loading of the specified widget page.
     */
    private int getWidgetPageLoadPriority(int page) {
        // If we are snapping to another page, use that index as the target page index
        int toPage = mCurrentPage;
        if (mNextPage > -1) {
            toPage = mNextPage;
        }

        // We use the distance from the target page as an initial guess of priority, but if there
        // are no pages of higher priority than the page specified, then bump up the priority of
        // the specified page.
        Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator();
        int minPageDiff = Integer.MAX_VALUE;
        while (iter.hasNext()) {
            AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next();
            minPageDiff = Math.abs(task.page - toPage);
        }

        int rawPageDiff = Math.abs(page - toPage);
        return rawPageDiff - Math.min(rawPageDiff, minPageDiff);
    }
    /**
     * Return the appropriate thread priority for loading for a given page (we give the current
     * page much higher priority)
     */
    private int getThreadPriorityForPage(int page) {
        // TODO-APPS_CUSTOMIZE: detect number of cores and set thread priorities accordingly below
        int pageDiff = getWidgetPageLoadPriority(page);
        if (pageDiff <= 0) {
            return Process.THREAD_PRIORITY_LESS_FAVORABLE;
        } else if (pageDiff <= 1) {
            return Process.THREAD_PRIORITY_LOWEST;
        } else {
            return Process.THREAD_PRIORITY_LOWEST;
        }
    }
    private int getSleepForPage(int page) {
        int pageDiff = getWidgetPageLoadPriority(page);
        return Math.max(0, pageDiff * sPageSleepDelay);
    }
    /**
     * Creates and executes a new AsyncTask to load a page of widget previews.
     */
    private void prepareLoadWidgetPreviewsTask(int page, ArrayList<Object> widgets,
            int cellWidth, int cellHeight, int cellCountX) {

        // Prune all tasks that are no longer needed
        Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator();
        while (iter.hasNext()) {
            AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next();
            int taskPage = task.page;
            if (taskPage < getAssociatedLowerPageBound(mCurrentPage) ||
                    taskPage > getAssociatedUpperPageBound(mCurrentPage)) {
                task.cancel(false);
                iter.remove();
            } else {
                task.setThreadPriority(getThreadPriorityForPage(taskPage));
            }
        }

        // We introduce a slight delay to order the loading of side pages so that we don't thrash
        final int sleepMs = getSleepForPage(page);
        AsyncTaskPageData pageData = new AsyncTaskPageData(page, widgets, cellWidth, cellHeight,
            new AsyncTaskCallback() {
                @Override
                public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) {
                    try {
                        try {
                            Thread.sleep(sleepMs);
                        } catch (Exception e) {}
                        loadWidgetPreviewsInBackground(task, data);
                    } finally {
                        if (task.isCancelled()) {
                            data.cleanup(true);
                        }
                    }
                }
            },
            new AsyncTaskCallback() {
                @Override
                public void run(AppsCustomizeAsyncTask task, AsyncTaskPageData data) {
                    mRunningTasks.remove(task);
                    if (task.isCancelled()) return;
                    // do cleanup inside onSyncWidgetPageItems
                    onSyncWidgetPageItems(data, false);
                }
            }, getWidgetPreviewLoader());

        // Ensure that the task is appropriately prioritized and runs in parallel
        AppsCustomizeAsyncTask t = new AppsCustomizeAsyncTask(page,
                AsyncTaskPageData.Type.LoadWidgetPreviewData);
        t.setThreadPriority(getThreadPriorityForPage(page));
        t.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, pageData);
        mRunningTasks.add(t);
    }

    /*
     * Widgets PagedView implementation
     */
    private void setupPage(PagedViewGridLayout layout) {
        // Note: We force a measure here to get around the fact that when we do layout calculations
        // immediately after syncing, we don't have a proper width.
        int widthSpec = MeasureSpec.makeMeasureSpec(mContentWidth, MeasureSpec.AT_MOST);
        int heightSpec = MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.AT_MOST);

        Drawable bg = getContext().getResources().getDrawable(R.drawable.quantum_panel_dark);
        if (bg != null) {
            bg.setAlpha(mPageBackgroundsVisible ? 255 : 0);
            layout.setBackground(bg);
        }
        layout.measure(widthSpec, heightSpec);
    }

    public void syncWidgetPageItems(final int page, final boolean immediate) {
        int numItemsPerPage = mWidgetCountX * mWidgetCountY;

        final PagedViewGridLayout layout = (PagedViewGridLayout) getPageAt(page);

        // Calculate the dimensions of each cell we are giving to each widget
        final ArrayList<Object> items = new ArrayList<Object>();
        int contentWidth = mContentWidth - layout.getPaddingLeft() - layout.getPaddingRight();
        final int cellWidth = contentWidth / mWidgetCountX;
        int contentHeight = mContentHeight - layout.getPaddingTop() - layout.getPaddingBottom();

        final int cellHeight = contentHeight / mWidgetCountY;

        // Prepare the set of widgets to load previews for in the background
        int offset = page * numItemsPerPage;
        int size = Math.min(offset + numItemsPerPage, mFilteredWidgets.size());
        for (int i = offset; i < size; ++i) {
            items.add(mFilteredWidgets.get(i));
        }

        // Prepopulate the pages with the other widget info, and fill in the previews later
        layout.setColumnCount(layout.getCellCountX());
        for (int i = 0; i < items.size(); ++i) {
            Object rawInfo = items.get(i);
            PendingAddItemInfo createItemInfo = null;
            PagedViewWidget widget = (PagedViewWidget) mLayoutInflater.inflate(
                    R.layout.apps_customize_widget, layout, false);
            if (rawInfo instanceof AppWidgetProviderInfo) {
                // Fill in the widget information
                AppWidgetProviderInfo info = (AppWidgetProviderInfo) rawInfo;
                createItemInfo = new PendingAddWidgetInfo(info, null, null);

                // Determine the widget spans and min resize spans.
                int[] spanXY = Launcher.getSpanForWidget(mLauncher, info);
                createItemInfo.spanX = spanXY[0];
                createItemInfo.spanY = spanXY[1];
                int[] minSpanXY = Launcher.getMinSpanForWidget(mLauncher, info);
                createItemInfo.minSpanX = minSpanXY[0];
                createItemInfo.minSpanY = minSpanXY[1];

                widget.applyFromAppWidgetProviderInfo(info, -1, spanXY, getWidgetPreviewLoader());
                widget.setTag(createItemInfo);
                widget.setShortPressListener(this);
            } else if (rawInfo instanceof ResolveInfo) {
                // Fill in the shortcuts information
                ResolveInfo info = (ResolveInfo) rawInfo;
                createItemInfo = new PendingAddShortcutInfo(info.activityInfo);
                createItemInfo.itemType = LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT;
                createItemInfo.componentName = new ComponentName(info.activityInfo.packageName,
                        info.activityInfo.name);
                widget.applyFromResolveInfo(mPackageManager, info, getWidgetPreviewLoader());
                widget.setTag(createItemInfo);
            }
            widget.setOnClickListener(this);
            widget.setOnLongClickListener(this);
            widget.setOnTouchListener(this);
            widget.setOnKeyListener(this);

            // Layout each widget
            int ix = i % mWidgetCountX;
            int iy = i / mWidgetCountX;

            if (ix > 0) {
                View border = widget.findViewById(R.id.left_border);
                border.setVisibility(View.VISIBLE);
            }
            if (ix < mWidgetCountX - 1) {
                View border = widget.findViewById(R.id.right_border);
                border.setVisibility(View.VISIBLE);
            }

            GridLayout.LayoutParams lp = new GridLayout.LayoutParams(
                    GridLayout.spec(iy, GridLayout.START),
                    GridLayout.spec(ix, GridLayout.TOP));
            lp.width = cellWidth;
            lp.height = cellHeight;
            lp.setGravity(Gravity.TOP | Gravity.START);
            layout.addView(widget, lp);
        }

        // wait until a call on onLayout to start loading, because
        // PagedViewWidget.getPreviewSize() will return 0 if it hasn't been laid out
        // TODO: can we do a measure/layout immediately?
        layout.setOnLayoutListener(new Runnable() {
            public void run() {
                // Load the widget previews
                int maxPreviewWidth = cellWidth;
                int maxPreviewHeight = cellHeight;
                if (layout.getChildCount() > 0) {
                    PagedViewWidget w = (PagedViewWidget) layout.getChildAt(0);
                    int[] maxSize = w.getPreviewSize();
                    maxPreviewWidth = maxSize[0];
                    maxPreviewHeight = maxSize[1];
                }

                getWidgetPreviewLoader().setPreviewSize(
                        maxPreviewWidth, maxPreviewHeight, mWidgetSpacingLayout);
                if (immediate) {
                    AsyncTaskPageData data = new AsyncTaskPageData(page, items,
                            maxPreviewWidth, maxPreviewHeight, null, null, getWidgetPreviewLoader());
                    loadWidgetPreviewsInBackground(null, data);
                    onSyncWidgetPageItems(data, immediate);
                } else {
                    if (mInTransition) {
                        mDeferredPrepareLoadWidgetPreviewsTasks.add(this);
                    } else {
                        prepareLoadWidgetPreviewsTask(page, items,
                                maxPreviewWidth, maxPreviewHeight, mWidgetCountX);
                    }
                }
                layout.setOnLayoutListener(null);
            }
        });
    }
    private void loadWidgetPreviewsInBackground(AppsCustomizeAsyncTask task,
            AsyncTaskPageData data) {
        // loadWidgetPreviewsInBackground can be called without a task to load a set of widget
        // previews synchronously
        if (task != null) {
            // Ensure that this task starts running at the correct priority
            task.syncThreadPriority();
        }

        // Load each of the widget/shortcut previews
        ArrayList<Object> items = data.items;
        ArrayList<Bitmap> images = data.generatedImages;
        int count = items.size();
        for (int i = 0; i < count; ++i) {
            if (task != null) {
                // Ensure we haven't been cancelled yet
                if (task.isCancelled()) break;
                // Before work on each item, ensure that this task is running at the correct
                // priority
                task.syncThreadPriority();
            }

            images.add(getWidgetPreviewLoader().getPreview(items.get(i)));
        }
    }

    private void onSyncWidgetPageItems(AsyncTaskPageData data, boolean immediatelySyncItems) {
        if (!immediatelySyncItems && mInTransition) {
            mDeferredSyncWidgetPageItems.add(data);
            return;
        }
        try {
            int page = data.page;
            PagedViewGridLayout layout = (PagedViewGridLayout) getPageAt(page);

            ArrayList<Object> items = data.items;
            int count = items.size();
            for (int i = 0; i < count; ++i) {
                PagedViewWidget widget = (PagedViewWidget) layout.getChildAt(i);
                if (widget != null) {
                    Bitmap preview = data.generatedImages.get(i);
                    widget.applyPreview(new FastBitmapDrawable(preview), i);
                }
            }

            enableHwLayersOnVisiblePages();

            // Update all thread priorities
            Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator();
            while (iter.hasNext()) {
                AppsCustomizeAsyncTask task = (AppsCustomizeAsyncTask) iter.next();
                int pageIndex = task.page;
                task.setThreadPriority(getThreadPriorityForPage(pageIndex));
            }
        } finally {
            data.cleanup(false);
        }
    }

    @Override
    public void syncPages() {
        disablePagedViewAnimations();

        removeAllViews();
        cancelAllTasks();

        Context context = getContext();
        if (mContentType == ContentType.Applications) {
            for (int i = 0; i < mNumAppsPages; ++i) {
                AppsCustomizeCellLayout layout = new AppsCustomizeCellLayout(context);
                setupPage(layout);
                addView(layout, new PagedView.LayoutParams(LayoutParams.MATCH_PARENT,
                        LayoutParams.MATCH_PARENT));
            }
        } else if (mContentType == ContentType.Widgets) {
            for (int j = 0; j < mNumWidgetPages; ++j) {
                PagedViewGridLayout layout = new PagedViewGridLayout(context, mWidgetCountX,
                        mWidgetCountY);
                setupPage(layout);
                addView(layout, new PagedView.LayoutParams(LayoutParams.MATCH_PARENT,
                        LayoutParams.MATCH_PARENT));
            }
        } else {
            throw new RuntimeException("Invalid ContentType");
        }

        enablePagedViewAnimations();
    }

    @Override
    public void syncPageItems(int page, boolean immediate) {
        if (mContentType == ContentType.Widgets) {
            syncWidgetPageItems(page, immediate);
        } else {
            syncAppsPageItems(page, immediate);
        }
    }

    // We want our pages to be z-ordered such that the further a page is to the left, the higher
    // it is in the z-order. This is important to insure touch events are handled correctly.
    View getPageAt(int index) {
        return getChildAt(indexToPage(index));
    }

    @Override
    protected int indexToPage(int index) {
        return getChildCount() - index - 1;
    }

    // In apps customize, we have a scrolling effect which emulates pulling cards off of a stack.
    @Override
    protected void screenScrolled(int screenCenter) {
        final boolean isRtl = isLayoutRtl();

        mUseTransitionEffect = !mIsSwitchingState;

        super.screenScrolled(screenCenter);
        enableHwLayersOnVisiblePages();

        boolean isInOverscroll = mOverScrollX < 0 || mOverScrollX > mMaxScrollX;

        if (isInOverscroll) {
            int index = 0;
            float pivotX = 0f;
            final float leftBiasedPivot = 0.35f;
            final float rightBiasedPivot = 0.65f;
            final int lowerIndex = 0;
            final int upperIndex = getChildCount() - 1;

            final boolean isLeftPage = mOverScrollX < 0;
            index = (!isRtl && isLeftPage) || (isRtl && !isLeftPage) ? lowerIndex : upperIndex;
            pivotX = isLeftPage ? rightBiasedPivot : leftBiasedPivot;

            View v = getPageAt(index);

            if (!mOverscrollTransformsSet || Float.compare(mLastOverscrollPivotX, pivotX) != 0) {
                mOverscrollTransformsSet = true;
                mLastOverscrollPivotX = pivotX;
                v.setCameraDistance(mDensity * mCameraDistance);
                v.setPivotX(v.getMeasuredWidth() * pivotX);
            }

            float scrollProgress = getScrollProgress(screenCenter, v, index);
            float rotation = -TRANSITION_MAX_ROTATION * scrollProgress;
            v.setRotationY(rotation);
        } else {
            if (mOverscrollTransformsSet) {
                mOverscrollTransformsSet = false;
                View v0 = getPageAt(0);
                View v1 = getPageAt(getChildCount() - 1);
                v0.setRotationY(0);
                v1.setRotationY(0);
                v0.setCameraDistance(mDensity * mCameraDistance);
                v1.setCameraDistance(mDensity * mCameraDistance);
                v0.setPivotX(v0.getMeasuredWidth() / 2);
                v1.setPivotX(v1.getMeasuredWidth() / 2);
                v0.setPivotY(v0.getMeasuredHeight() / 2);
                v1.setPivotY(v1.getMeasuredHeight() / 2);
            }
        }
    }

    private void enableHwLayersOnVisiblePages() {
        final int screenCount = getChildCount();

        getVisiblePages(mTempVisiblePagesRange);
        int leftScreen = mTempVisiblePagesRange[0];
        int rightScreen = mTempVisiblePagesRange[1];
        int forceDrawScreen = -1;
        if (leftScreen == rightScreen) {
            // make sure we're caching at least two pages always
            if (rightScreen < screenCount - 1) {
                rightScreen++;
                forceDrawScreen = rightScreen;
            } else if (leftScreen > 0) {
                leftScreen--;
                forceDrawScreen = leftScreen;
            }
        } else {
            forceDrawScreen = leftScreen + 1;
        }

        for (int i = 0; i < screenCount; i++) {
            final View layout = (View) getPageAt(i);
            if (!(leftScreen <= i && i <= rightScreen &&
                    (i == forceDrawScreen || shouldDrawChild(layout)))) {
                layout.setLayerType(LAYER_TYPE_NONE, null);
            }
        }
    }

    protected void overScroll(float amount) {
        dampedOverScroll(amount);
    }

    /**
     * Used by the parent to get the content width to set the tab bar to
     * @return
     */
    public int getPageContentWidth() {
        return mContentWidth;
    }

    @Override
    protected void onPageEndMoving() {
        super.onPageEndMoving();
        mForceDrawAllChildrenNextFrame = true;
        // We reset the save index when we change pages so that it will be recalculated on next
        // rotation
        mSaveInstanceStateItemIndex = -1;
    }

    private void onTransitionPrepare() {
        mIsSwitchingState = true;

        // Invalidate here to ensure that the pages are rendered during the state change transition.
        invalidate();

        enableHwLayersOnVisiblePages();
    }

    private void onTransitionEnd() {
        mIsSwitchingState = false;
    }

    public Comparator<AppInfo> getComparatorForSortMode() {
        switch (mSortMode) {
            case Title:
                return LauncherModel.getAppNameComparator();
            case LaunchCount:
                return LauncherModel.getAppLaunchCountComparator(mLauncher.getStats());
            case InstallTime:
                return LauncherModel.APP_INSTALL_TIME_COMPARATOR;
        }
        return LauncherModel.getAppNameComparator();
    }

    public void setSortMode(SortMode sortMode) {
        if (mSortMode == sortMode) return;

        mSortMode = sortMode;

        sortApps();
    }

    public void sortApps() {
        Collections.sort(mFilteredApps, getComparatorForSortMode());

        if (mContentType == ContentType.Applications) {
            for (int i = 0; i < getChildCount(); i++) {
                syncAppsPageItems(i, true);
            }
        }
    }

    public SortMode getSortMode() {
        return mSortMode;
    }

    /*
     * AllAppsView implementation
     */
    public void setup(Launcher launcher, DragController dragController) {
        mLauncher = launcher;
        mDragController = dragController;
        int sortMode = SettingsProvider.getIntCustomDefault(mLauncher, SettingsProvider.SETTINGS_UI_DRAWER_SORT_MODE, -1);
        if (sortMode != -1) {
            setSortMode(SortMode.getModeForValue(sortMode));
        }
    }

    /**
     * We should call thise method whenever the core data changes (mApps, mWidgets) so that we can
     * appropriately determine when to invalidate the PagedView page data.  In cases where the data
     * has yet to be set, we can requestLayout() and wait for onDataReady() to be called in the
     * next onMeasure() pass, which will trigger an invalidatePageData() itself.
     */
    private void invalidateOnDataChange() {
        if (!isDataReady()) {
            // The next layout pass will trigger data-ready if both widgets and apps are set, so
            // request a layout to trigger the page data when ready.
            requestLayout();
        } else {
            cancelAllTasks();
            invalidatePageData();
        }
    }

    public void setShowSystemApps(boolean show) {
        if (show) {
            mFilterApps |= FILTER_APPS_SYSTEM_FLAG;
        } else {
            mFilterApps &= ~FILTER_APPS_DOWNLOADED_FLAG;
        }
    }

    public boolean getShowSystemApps() {
        return (mFilterApps & FILTER_APPS_SYSTEM_FLAG) != 0;
    }

    public boolean getShowDownloadedApps() {
        return (mFilterApps & FILTER_APPS_DOWNLOADED_FLAG) != 0;
    }

    public void setApps(ArrayList<AppInfo> list) {
        if (!LauncherAppState.isDisableAllApps()) {
            mApps = list;

            if (mPreInstallConfig) {
                configPreInstallAppInfos();
                removePreInstallApps();
            }

            if (mPreInstallConfig) {
                addPreInstallApps();
            }

            sortByCustomization();
            filterAppsWithoutInvalidate();
            updatePageCountsAndInvalidateData();
        }
    }

    private boolean appStringEqualsComponentName(String appString, ComponentName componentName) {
        String packageName = "";
        String className = "";

        if (appString.contains("/")) {
            String[] parts = appString.split("/");
            packageName = parts[0];
            if (parts.length > 1) {
                className = parts[1];
            }

            return packageName.equals(componentName.getPackageName())
                    && componentName.getClassName().equals(className);
        } else {
            // There is no separator, the whole input string is the class name.
            return componentName.getClassName().equals(appString);
        }
    }

    /**
     * Check if the given AppInfo exists in the given list of predetermined apps.
     *
     * The supported syntax for the strings in appList is one of:
     *
     * com.example.package/com.example.package.Activity
     *
     * or just the Activity name:
     *
     * com.example.package.Activity.
     *
     *
     * If the package name is supplied, the ComponentName instance must match
     * both the package name and the class name. Otherise, only the class name must match.
     */
    private boolean appListContainsInfo(ArrayList<String> appList,
                                        ComponentName componentName) {
        return getIndexOfComponent(appList, componentName) != -1;
    }

    private int getIndexOfComponent(ArrayList<String> appList,
                                    ComponentName componentName) {
        int index = 0;
        for (String appString : appList) {
            boolean wasFound = appStringEqualsComponentName(appString, componentName);
            if (wasFound) {
                return index;
            }
            index++;
        }
        // No match
        return -1;
    }

    private void addAppsWithoutInvalidate(ArrayList<AppInfo> list) {
        // We add it in place, in alphabetical order
        int count = list.size();
        final int INVALID_INDEX = -1;

        for (int i = 0; i < count; ++i) {
            AppInfo info = list.get(i);

            if (appListContainsInfo(mCTFirstPageArray, info.componentName)) {
                //for CT first page
                int index = Collections.binarySearch(ctFirstPageApps, info,
                        APP_CT_FIRSTPAGE_COMPARATOR);

                if (index < 0) {
                    ctFirstPageApps.add(-(index + 1), info);
                }
            } else if (appListContainsInfo(mCTClassArray, info.componentName)) {
                int index = Collections.binarySearch(ctApps, info, APP_CT_COMPARATOR);

                if (index < 0){
                    ctApps.add(-(index + 1), info);
                }
            } else {
                int index = Collections.binarySearch(mApps, info,
                                                     getComparatorForSortMode());

                if (index < 0) {
                    mApps.add(-(index + 1), info);
                }
            }
        }
    }

    public void addApps(ArrayList<AppInfo> list) {
        if (!LauncherAppState.isDisableAllApps()) {
            //remove appinfo if list contains preinstallapk
            ArrayList<AppInfo> preList = new ArrayList<AppInfo>();

            for(int i = 0; i< list.size(); i++){
                AppInfo info = list.get(i);

                if (appListContainsInfo(mPreClassArray, info.componentName)) {
                    preList.add(info);
                }
            }

            mPreAppList.addAll(preList);
            list.removeAll(preList);
            Collections.sort(mPreAppList, PREAPP_CT_COMPARATOR);

            if (mPreInstallConfig) {
                removePreInstallApps();
            }

            addAppsWithoutInvalidate(list);

            if (mPreInstallConfig) {
                addPreInstallApps();
            }

            filterAppsWithoutInvalidate();
            updatePageCountsAndInvalidateData();
        }
    }

    private int findAppByComponent(List<AppInfo> list, AppInfo item) {
        ComponentName removeComponent = item.intent.getComponent();
        int length = list.size();
        for (int i = 0; i < length; ++i) {
            AppInfo info = list.get(i);
            if (info.user.equals(item.user)
                    && info.intent.getComponent().equals(removeComponent)) {
                return i;
            }
        }
        return -1;
    }
    private void removeAppsWithoutInvalidate(ArrayList<AppInfo> list) {
        // loop through all the apps and remove apps that have the same component
        int length = list.size();
        final int INVALID_INDEX = -1;
        for (int i = 0; i < length; ++i) {
            AppInfo info = list.get(i);
            if(ctFirstPageApps.contains(info)) { //for CT first page
                int removeCTFirstPageIndex = findAppByComponent(ctFirstPageApps, info);
                if (removeCTFirstPageIndex > INVALID_INDEX) {
                    ctFirstPageApps.remove(removeCTFirstPageIndex);
                }
            } else if(ctApps.contains(info)){ //for CT
                int removeCTIndex = findAppByComponent(ctApps, info);
                if (removeCTIndex > INVALID_INDEX) {
                    ctApps.remove(removeCTIndex);
                }
            } else {
                int removeIndex = findAppByComponent(mApps, info);
                if (removeIndex > INVALID_INDEX) {
                    mApps.remove(removeIndex);
                }
            }
        }
    }
    public void removeApps(ArrayList<AppInfo> appInfos) {
        if (!LauncherAppState.isDisableAllApps()) {
            removeAppsWithoutInvalidate(appInfos);
            filterAppsWithoutInvalidate();
            updatePageCountsAndInvalidateData();
        }
    }

    public void updateApps(ArrayList<AppInfo> list) {
        // We remove and re-add the updated applications list because it's properties may have
        // changed (ie. the title), and this will ensure that the items will be in their proper
        // place in the list.
        if (!LauncherAppState.isDisableAllApps()) {
            removeAppsWithoutInvalidate(list);

            if (mPreInstallConfig) {
                removePreInstallApps();
            }

            addAppsWithoutInvalidate(list);
            if (mPreInstallConfig) {
                addPreInstallApps();
            }
            filterAppsWithoutInvalidate();
            updatePageCountsAndInvalidateData();
        }
    }

    public void filterAppsWithoutInvalidate() {
        updateProtectedAppsList(mLauncher);

        mFilteredApps = new ArrayList<AppInfo>(mApps);
        Iterator<AppInfo> iterator = mFilteredApps.iterator();
        while (iterator.hasNext()) {
            AppInfo appInfo = iterator.next();
            boolean system = (appInfo.flags & AppInfo.DOWNLOADED_FLAG) == 0;
            if (mProtectedApps.contains(appInfo.componentName) ||
                    (system && !getShowSystemApps()) ||
                    (!system && !getShowDownloadedApps())) {
                iterator.remove();
            }
        }
        Collections.sort(mFilteredApps, getComparatorForSortMode());
    }

    public void filterApps() {
        filterAppsWithoutInvalidate();
        updatePageCountsAndInvalidateData();
    }

    public void filterWidgetsWithoutInvalidate() {
        updateProtectedAppsList(mLauncher);

        mFilteredWidgets = new ArrayList<Object>(mWidgets);

        Iterator<Object> iterator = mFilteredWidgets.iterator();
        while (iterator.hasNext()) {
            Object o = iterator.next();

            String packageName;
            if (o instanceof AppWidgetProviderInfo) {
                AppWidgetProviderInfo widgetInfo = (AppWidgetProviderInfo) o;
                if (widgetInfo.provider == null) {
                    continue;
                }
                packageName = widgetInfo.provider.getPackageName();
            } else if (o instanceof ResolveInfo) {
                ResolveInfo shortcut = (ResolveInfo) o;
                packageName = shortcut.activityInfo.applicationInfo.packageName;
            } else {
                Log.w(TAG, "Unknown class in widgets list: " + o.getClass());
                continue;
            }

            int flags;
            try {
                flags = AppInfo.initFlags(mPackageManager.getPackageInfo(packageName, 0));
            } catch (PackageManager.NameNotFoundException e) {
                flags = 0;
            }

            boolean system = (flags & AppInfo.DOWNLOADED_FLAG) == 0;
            if (mProtectedPackages.contains(packageName) ||
                    (system && !getShowSystemApps()) ||
                    (!system && !getShowDownloadedApps())) {
                iterator.remove();
            }
        }
    }

    public void filterWidgets() {
        filterWidgetsWithoutInvalidate();
        updatePageCountsAndInvalidateData();
    }


    private void updateProtectedAppsList(Context context) {
        String protectedComponents = Settings.Secure.getString(context.getContentResolver(),
                LauncherModel.SETTINGS_PROTECTED_COMPONENTS);
        protectedComponents = protectedComponents == null ? "" : protectedComponents;
        String [] flattened = protectedComponents.split("\\|");
        mProtectedApps = new ArrayList<ComponentName>(flattened.length);
        mProtectedPackages = new ArrayList<String>(flattened.length);
        for (String flat : flattened) {
            ComponentName cmp = ComponentName.unflattenFromString(flat);
            if (cmp != null) {
                mProtectedApps.add(cmp);
                mProtectedPackages.add(cmp.getPackageName());
            }
        }
    }

    private ArrayList<String> getPackageNameFromAppInfo(ArrayList<AppInfo> list) {
        if (list == null) return null;

        ArrayList<String> packagesNames = new ArrayList<String>();
        int size = list.size();

        for (int i = 0; i < size; i++) {
            packagesNames.add(list.get(i).componentName.getPackageName());
        }

        return packagesNames;
    }

    public void reset() {
        // If we have reset, then we should not continue to restore the previous state
        mSaveInstanceStateItemIndex = -1;

        if (mContentType != ContentType.Applications) {
            setContentType(ContentType.Applications);
        }

        if (mCurrentPage != 0) {
            invalidatePageData(0);
        }
    }

    private AppsCustomizeTabHost getTabHost() {
        return (AppsCustomizeTabHost) mLauncher.findViewById(R.id.apps_customize_pane);
    }

    public void dumpState() {
        // TODO: Dump information related to current list of Applications, Widgets, etc.
        AppInfo.dumpApplicationInfoList(TAG, "mApps", mApps);
        dumpAppWidgetProviderInfoList(TAG, "mWidgets", mWidgets);
    }

    private void dumpAppWidgetProviderInfoList(String tag, String label,
            ArrayList<Object> list) {
        Log.d(tag, label + " size=" + list.size());
        for (Object i: list) {
            if (i instanceof AppWidgetProviderInfo) {
                AppWidgetProviderInfo info = (AppWidgetProviderInfo) i;
                Log.d(tag, "   label=\"" + info.label + "\" previewImage=" + info.previewImage
                        + " resizeMode=" + info.resizeMode + " configure=" + info.configure
                        + " initialLayout=" + info.initialLayout
                        + " minWidth=" + info.minWidth + " minHeight=" + info.minHeight);
            } else if (i instanceof ResolveInfo) {
                ResolveInfo info = (ResolveInfo) i;
                Log.d(tag, "   label=\"" + info.loadLabel(mPackageManager) + "\" icon="
                        + info.icon);
            }
        }
    }

    public void surrender() {
        // TODO: If we are in the middle of any process (ie. for holographic outlines, etc) we
        // should stop this now.

        // Stop all background tasks
        cancelAllTasks();
    }

    /*
     * We load an extra page on each side to prevent flashes from scrolling and loading of the
     * widget previews in the background with the AsyncTasks.
     */
    final static int sLookBehindPageCount = 2;
    final static int sLookAheadPageCount = 2;
    protected int getAssociatedLowerPageBound(int page) {
        final int count = getChildCount();
        int windowSize = Math.min(count, sLookBehindPageCount + sLookAheadPageCount + 1);
        int windowMinIndex = Math.max(Math.min(page - sLookBehindPageCount, count - windowSize), 0);
        return windowMinIndex;
    }
    protected int getAssociatedUpperPageBound(int page) {
        final int count = getChildCount();
        int windowSize = Math.min(count, sLookBehindPageCount + sLookAheadPageCount + 1);
        int windowMaxIndex = Math.min(Math.max(page + sLookAheadPageCount, windowSize - 1),
                count - 1);
        return windowMaxIndex;
    }

    protected String getCurrentPageDescription() {
        int page = (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage;
        int stringId = R.string.default_scroll_format;
        int count = 0;

        if (mContentType == ContentType.Applications) {
            stringId = R.string.apps_customize_apps_scroll_format;
            count = mNumAppsPages;
        } else if (mContentType == ContentType.Widgets) {
            stringId = R.string.apps_customize_widgets_scroll_format;
            count = mNumWidgetPages;
        } else {
            throw new RuntimeException("Invalid ContentType");
        }

        return String.format(getContext().getString(stringId), page + 1, count);
    }

    private void configClassArray(Context context, ArrayList arrayList,
            String arrayName, boolean isPreInstallClass) {

        Context prePackageContext = null;

        try {
            prePackageContext = context.createPackageContext(PRE_PACKAGE_NAME,
                    Context.CONTEXT_IGNORE_SECURITY);
        } catch (Exception e) {
            Log.e(TAG, "Create Res Apk Failed");
        }

        if (prePackageContext != null) {
            final int resId = prePackageContext.getResources().getIdentifier(
                    arrayName, "array", PRE_PACKAGE_NAME);

            if (resId == 0) {
                return;
            }

            final String[] preApps = prePackageContext.getResources().getStringArray(resId);
            int size = preApps.length;

            if(isPreInstallClass){
                mPreInstallConfig = true;
            }

            arrayList.clear();

            for (int i=0; i<size; i++) {
                arrayList.add(preApps[i]);
            }
        }
    }

    private void configPreInstallAppInfos() {
        mPreAppList.clear();

        int N = mApps.size();
        int preCount = mPreClassArray.size();

        for (int i =0; i<preCount; i++) {
            for (int j=0; j<N; j++) {
                final AppInfo item = mApps.get(j);
                String appString = mPreClassArray.get(i);
                if (appStringEqualsComponentName(appString, item.componentName)) {
                    mPreAppList.add(item);
                }
            }
        }
    }

    private void removePreInstallApps() {
        mApps.removeAll(mPreAppList);
    }

    private void addPreInstallApps() {
        mApps.addAll(0,mPreAppList);
    }

    private void sortByCustomization() {
        if(LauncherApplication.SHOW_CTAPP_FEATURE){
            ctApps.clear();
            ctFirstPageApps.clear();

            for (AppInfo info:mApps) {
                ComponentName componentName = info.componentName;
                int index = getIndexOfComponent(mCTClassArray, componentName);

                if(index > -1){
                    ctApps.add(info);
                }

                int firstPageIndex = getIndexOfComponent(mCTFirstPageArray, componentName);

                if(firstPageIndex > -1){
                    ctFirstPageApps.add(info);
                }
            }

            mApps.removeAll(ctApps);
            Collections.sort(ctApps, APP_CT_COMPARATOR);

            mApps.removeAll(ctFirstPageApps);
            Collections.sort(ctFirstPageApps, APP_CT_FIRSTPAGE_COMPARATOR);
        }
    }
}